2102102202021 has 16 divisors (see below), whose sum is σ = 2803900449600. Its totient is φ = 1400852838528.

The previous prime is 2102102201993. The next prime is 2102102202023. The reversal of 2102102202021 is 1202022012012.

It is not a de Polignac number, because 2102102202021 - 2²⁶ = 2102035093157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102102202023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106647115 + ... + 106666823.

It is an arithmetic number, because the mean of its divisors is an integer number (175243778100).

Almost surely, 2^{2102102202021} is an apocalyptic number.

It is an amenable number.

2102102202021 is a deficient number, since it is larger than the sum of its proper divisors (701798247579).

2102102202021 is a wasteful number, since it uses less digits than its factorization.

2102102202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31828.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2102102202021 its reverse (1202022012012), we get a palindrome (3304124214033).

The spelling of 2102102202021 in words is "two trillion, one hundred two billion, one hundred two million, two hundred two thousand, twenty-one".